The immunopathogenosis of chronic hepatitis B is complex. The host immune response plays an important role in determining the turnover of chronic hepatitis B, which is impacted by HBV, host immune system and liver microenvironment. In clinical practice, interferin-α (IFN-α) which has both anti-virus and immuno-regulatary effect wins the advantage over nucleoside analogue. During treatment with INF-α, quantitative HBsAg can predict therapy early which can make physicians modulate individual therapy strategy and achieve better curative effect. To better understand the anti-HBV immune responses to chronic hepatitis B, scientists hope to explore more effective and potential immunotherapeutic strategies against this disease.

This article studies the application value of disposable umbilical cord clamp and amputator during gravida childbirth.The umbilicalis is clamped and sheared with disposable umbilical cord clamp and amputator in the area of 3~5mm far from the neonatal abdomen.The operation is simple and consumedly shortens the time and reduces the procedure compared to the traditional method.It is safe and convenient,which is worth spreading.

The chemical composition, separation and identification of the components as well as the tumor photobiological activities of the major components of the new tumor-photochemodiagnostic and photochemotherapeutic agent photocarcinorin (PsD-007) were represented in this paper. It has been shown by the results of HPLC analysis in combination with spectroscopic determinations that PsD-007 is composed of 7 different porphyrins: MHD, DMD, MVD, AHD, HVD, Hp and Pp. The experimental results show that MHD, DMD and MVD are the major tumor photobiologically active components of PsD-007.

ObjectiveTo investigate the expression of nucleolin in osteosarcoma and its clinicalsignificance.MethodsThe expression of nucleolin was evaluated by immunohistochemistry in paraffin-em bedded tissues from 35 cases of osteosarcoma and 15 cases of osteochondroma.ResultsAmong the osteo sarcoma cases, 8.6％ were negative for nucleolin, 20％ weakly positive, 34.3％ moderate positive, 37.1％ strong positive.The positive rate of nucleolin in osteochondroma was 40％, 46.7％, 13.3％, 0％, respectively.The nucleolin expression showed significant difference in the osteosarcoma and osteochondroma(P ＜0.01).Among the conventional ostcosarcoma cases, 6.9％ were negative for nucleolin, 13.8％ weakly positive, 34.5％ moderate positive, 44.8％ strong positive.The positive rate of nucleolin in paros teal osteochondroma was 16.7％, 50％, 33.3％, 0％, respectively.The nucleolin expression showed re markable correlation with pathological and genetical classification (P ＜ 0.05).The positive rate of nucleo 1in in osteoblastic osteochondroma was 5.9％, 5.9％, 29.4％, 58.8％, while in chondroblastic osteochon droma 0％, 33.3％, 33.3％, 33.3％ and 16.7％, 16.7％, 50％, 16.7％ in fibroblastic osteochondro ma, respectively.The positive expressions of nucleolin were almost the same in each subtype of osteosarco ma (P ＞ 0.05).ConclusionsThe nucleolin expression had correlation with property of tumors in bone, and the positive expressions of nucleolin had correlation with pathological and genetic classification of osteo

Objective:To investigate the influence of lung inflation on MR perfusion imaging of human lung using an arterial spin labeling sequence called flow sensitive alternating inversion recovery(FAIR).Methods:Coronal perfusion-weighted images were obtained at different respiratory phases from 10 healthy volunteers on a 1.5T whole body scanner(GE medical system)using FAIR sequence.The changes of tagging efficiency of pulmonary parenchyma(?SI %),pulmonary blood flow and area of the scanning slice of different respiratory phases were analyzed.Results:(1)Significant difference was found in ?SI% between different respiratory phases(right lung P=0.021 5,left lung P=0.008 4),with that at end expiration greater than that at end inspiration.(2)Significant difference was also found in pulmonary blood flow at different respiratory phases(right lung P=8.92?10-5,left lung P=0.000 2),with that at end expiration higher than that at end inspiration.(3)The areas of the scanning slice were also significantly different at different respiratory phases(right lung P=2.94?10-5,left lung P=0.000 5),with that at end inspiration larger than that at end expiration.Conclusion:Pulmonary blood flow during expiration is higher than that during inspiration,which might be due to the decreased lung volume and increased vascular density during expiration.

Objective:To investigate the prognostic value of neutrophil to lymphocyte ratio (NLR), platelet to lymphocyte ratio (PLR), and prognostic nutritional index (PNI) before radiation in pancreatic cancer patients underwent radiation therapy. Methods:Clinical data of 61 patients with pathologically confirmed pancreatic cancer were retrospectirely analyzed. Query index values for each patient were clinically tested through electronic medical records. Overall survival (OS) data were collected through electronic medical records or telephone follow-up. Survival curves were compared using Kaplan-Meier methodology and log-rank test. Cox regression methodolo-gy was used for univariate analysis. Results:Using log-rank test and univariate regression analysis, we found that patients with lower NLR, PLR, CA19-9, increased PNI, and lower TNM-staging lived longer than those with increased NLR, PLR, CA19-9, lower PNI, and high-er TNM-staging, and that the difference was statistically significant. Through multivariate analysis, we found that NLR (P=0.029, OR 2.344, 95%CI:1.090-5.041) and PNI (P=0.026, OR 0.477, 95%CI:0.248-0.917) were independent predictors of OS in patients with pan-creatic cancer. Conclusion:NLR, PLR, and PNI are simple, effective, and reliable indicators for evaluating the prognosis of pancreatic cancer.

Objective To define the secretory capability of angiogenin factors by bone marrow mononuclear cells(BM-MNC) cultured in vitro.Methods Rat BM-MNCs were isolated by centrifugation through a Histopaque density gradient and cultured for four weeks in vitro.The levels of vascular endothelial cell growth factor(VEGF),basic fibroblast growth factor(bFGF) and interleukin-1?(IL-1?) were tested by enzyme-linked immunosorbent assay(ELISA).Results The levels of VEGF in the conditioned medium at 1,2,3 and 4 weeks were(24.40?7.99),(89.28?5.13),(115.24?10.08) and(157.00?15.64) pg/ml,respectively.The levels of bFGF at 1,2,3 and 4 weeks were(52.72?2.13),(48.10?6.41),(44.71?3.21) and(25.61?2.42) pg/ml respectively,and those of IL-1? were(31.28?5.44),(71.87?3.01),(55.77?11.94) and(41.75?9.14),respectively.Conclusion The BM-MNCs can persistently secrete potent angiogenic cytokines such as VEGF,bFGF and IL-1?.

Objective To investigate the effect of gravity and lung volume on MR perfusion imaging of human lung using an arterial spin labeling sequence called flow sensitive alternating inversion recovery(FAIR).MethodsMagnetic resonance imaging of lung perfusion was performed in supine position in ten healthy volunteers on a 1.5 T whole body scanner(GE medical system).Five sequentially coronal slices with the gap of 3cm from dorsal to ventral(labeled as P3,P6,P9,P12,P15,respeectivly)were obtained on end respiration and the relative pulmonary blood flow(rPBF)was measured.Another coronal perfusion-weighted image of P3 slice was obtained on end inspiration.Tagging efficiency of pulmonary parenchyma with IR(⊿SI%),the rPBF and area of the P3 slice were analyzed.respectively.Paired Student's t test was used for statistical analysis.Results(1)In the direction of gravity,an increase in rPBF of the gravity-dependent lung was found.rPBF of right lung from dorsal to ventral were 100.57±18.22,79.57±12.36,61.65±11.15,48.92±9.96,41.20±9.88,respectively；and that of left lung were 106.61±26.99,78.89±11.98,64.00±13.64,51.27±8.95,43.04±12.18.No statistical differences between P12 and P15,there were significant statistic differences of any other two coronal planes.But along an isogravitational plane,no statistical difference was observed.Regression coefficients of right and left lung were -4.98 and -5.16,respectively.This means the rPBF of right lung falls by 4.98 for each centimeter above the dorsal and that of left lung falls by 5.16.(2)For(⊿)SI%,rPBF and area,there were significant statistic differences at different respiratory phases(P＜0.05).(⊿)SI%,rPBF,area at expiration phase vs.inspiration phase were 1.12±0.31 vs 0.71±0.18,90.78±17.35 vs 52.85±8.75,(12.59±3.23)×103mm2 vs (17.77±4.24)×103mm2 for right lung;and 1.01±0.24 vs 0.70±0.11,91.08±18.68 vs 54.58±10.70,(12.34±3.08)×103mm2 vs(17.34±4.98)×103mm2 for left lung.Greater (⊿)SI%and increased perfusion were observed on end expiration than on end inspiration.The area was larger on end inspiration than on end expiration.ConclusionsThe FAIR is sensitive to perfusion changes in the gravity-dependent lung.Pulmonary blood flow is less in a state of high lung inflation than in a low state(inspiration vs.expiration).Positioning the patient so that the area of interest is down-gravity and breath-hold on end expiration may improve visibility of perfusion defects.

Objective To introduce a newly-developed special laryngoscopic lens.Methods The structures of the new-style laryngoscopic lens and the old one were compared so as to highlight the advantages of the new-style one.Results For the special patients(e.g.patients with min-chin,high-larynx,fatness,short-neck,fore-tooth standing out,and corpulent lingua),special laryngoscopic lens could stir up epiglottis much more,expose glottis,and achieve incubationeasily.Besides,it could also be applied to normal patients.Conclusion The special laryngoscopic lens is practical,easily-operated and reliable.

Objective To develop a gene chip for the detection of pathogens causing genital ulcer diseases (GUDs). Methods Specific probes of 4 different pathogens were designed and synthesized. Gene chip was prepared by blotting the probes onto specially treated glass slides with the use of a robotics. Target genes of standard strains for the 4 different pathogens and the clinical specimens were amplified by PCR with Cy5 fluorescence labeled primers. The labeled amplicons were hybridized with gene chips, and then scanned and analyzed using computer software. Results The fluorescence signal for specific pathogen could be found in the gene chip, illustrating that one specific fluorescence signal denoted a single pathogen, and the combination of different signals denoted the corresponding co-existence of pathogens. Examination of 40 clinical specimens obtained from 40 patients with genital ulcers with gene chip was in good concordance with dark-field microscopy plus PCR or HSV culture plus PCR, showing Kappa values of 0.882 and 0.947, respectively. In addition, mixed infections were detected in 2 specimens. Conclusion Gene chip is a sensitive method with a reliable result and it can detect multiple infections simultaneously.